4 ‘ 
1878.] Scientific News. 411 
announces his withdrawal from that company and his establish- 
ment of a factory in Rochester, in his own name, devoted entirely 
to microscopical work. He offers stands, with all his former 
improvements and with some minor advantages now added, and 
objectives of increased angle and reduced price. His higher 
powers will be on the four-system plan, and claim the excessive 
aperture of 150 degrees in water. 
_ Excuances.—Isthmia nervosa, rich specimens 2 situ on alge, 
in exchange for any good mounted objects. M.A. Booth, Long- 
meadow, Mass. 
Leaves with very beautiful stellate hairs and also a variety of 
marine objects, from the Bahamas, in exchange for mounted or 
unmounted objects. C. C. Merriman, Rochester, N. Y. 
WantTED—Some well posted diatomist to give the names of 
diatoms, arranged, on a few slides, in exchange for the slides. 
C. M. Vorce, Cleveland, Ohio. 
:0:— 
SCIENTIFIC NEWS. 
— Science in America has met with an irreparable loss in the 
death of the honored and revered Prof. Joseph Henry, secretary 
of the Smithsonian Institution since 1846, and president of the 
National Academy of Sciences. e was born in Albany, N. Y., 
December 17, 1797, and died May 13, working at his post, 
engaged, until a few days before his death, in arduous and respon- 
sible duties. We have but space, at this time, to record briefly 
the decease of this eminent investigator and able administrator. 
— Ina recent letter from Edward Desor, of Neuchatel, Switzer- 
land, he states “ that he has been diverted from his ordinary pur- 
suits by that mischievous beast which has invaded us from North 
America, viz: the Piylxera. We have some hope that we shall 
infested viper, viz: by guid sulphurous acid, which has been 
applied recently with success at Geneva. Besides that I am | 
prosecuting my investigations on some geological and pre-histori- 
cal problems, especially the cups and archaic signs on the erratic 
boulders.’—F. V. H. 
— The Annual Report of the Vienna Imperial Geological 
Institute shows that the usual activity pervades this model insti- 
tution. Additions to the special map of the empire have been 
carried on in the Central Alps, and from the Alps to the Venetian 
plain, as well as in Eastern Galicia, North-eastern Hungary and 
the Dneister region, while still other local surveys have been 
carried on in Austria. Collaberation with other geologists in 
Bohemia and Hungary has gone on, while the museum an : 
library have been re-arranged in part, and heavy accessions made, —— 
(From a letter to Prof. F. V. Hayden by Count Marschall.) 
